This function will return the height (in pixels) of the input string. It is very handy for calculating distances between text elements based on the tallest of the letters that make up the string as it would be drawn with draw_text using the currently defined font.
Argument Description string The string to measure the height of.
hh = string_height("ABCDEFGHIJKLMNOPQRSTUVWXYZ");
draw_text(32, 32, string(score));
draw_text(32, 32 + hh, string(lives);
The above code will get the height of the given string and then draw two lines of text, using the returned string height as a separator.